sexual activity vs degrade

sexual activity is a noun but degrade is not a noun.

Word	Noun	Adjective	Verb	Adverb
sexual activity	Yes	No	No	No
degrade	No	No	Yes	No

sexual activity (noun)	degrade (noun)
activities associated with sexual intercourse

sexual activity (verb)	degrade (verb)
	lower the grade of something; reduce its worth
	reduce the level of land, as by erosion
	reduce in worth or character, usually verbally